This volume deals with cross-border infrastructural cooperation during the Second World War. It compares the development of postal services, telecommunications, railways and shipping, and places its findings in the context of the long-term developments of European integration. It therefore calls into question the hitherto dominant assumption that the Second World War signalled a caesura in international cooperation. At the same time, the study shows that cross-border initiatives were undertaken not only in spite of the war, but sometimes precisely because of it. The individual contributions thus also intervene in the debate on 'New Europe'.